JPH033557Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Purpose of the invention [Industrial application field] This invention relates to coarse glass cloth used as a reinforcing material when applying waterproof coating to the surface of a building. At the same time,
The purpose of this invention is to obtain an adhesive coarse-grained glass cloth laminated on one side with a nonwoven fabric that has improved retention of finish coating resin.

[Conventional technology]

It has been known in the art to reinforce the coating layer by interposing coarse glass cloth between the substrate and the coating layer when applying finishing coatings such as waterproofing to the floors and exterior walls of buildings. As the glass cloth, plain woven fabrics and leno woven fabrics with a thread density of about 2 to 20 threads/25 mm are usually used.

Conventional coating methods usually involve applying a primer coat to a base surface such as concrete or mortar, applying an adhesive to the surface, stretching and pasting coarse glass cloth, and then applying a finishing coat such as polyurethane resin after the adhesive has cured. However, when applying to vertical surfaces such as walls or stairs, it is insufficient to prevent the liquid coating resin from dripping, so a reinforcing sheet made by laminating a non-woven fabric on one side of the coarse glass cloth is used. It's being used. However, in order to attach a reinforcing sheet made of coarse glass cloth or non-woven fabric laminated to a coarse glass cloth onto a base surface, after applying a uniform coating of adhesive to the base surface, the reinforcing sheet must be smoothed so that there are no irregularities or looseness. Pressure bonding is necessary, which makes the coating work cumbersome, and it is particularly difficult to perform good coating on vertical surfaces.

In order to solve this problem, we laminated coarse glass cloth and a release sheet with an adhesive layer.
A device has been devised in which the adhesive layer is applied only to the lower surface of the threads of the coarse glass cloth by peeling off the release sheet during use. (Refer to Japanese Utility Model Application Nos. 61-8134 and 61-16347) [Problems to be solved by the invention] According to the above invention, the conventional application of adhesive to the base surface can be omitted, and the coating work can be simplified. Efficiency is improved,
Another advantage is that the amount of adhesive that adheres to the glass cloth can be kept to a minimum. However, by using a release sheet, it is unavoidable that the shape and weight will increase when it is normally rolled, making it difficult to use. In addition to requiring time and effort to peel off the release sheet and then dispose of the release sheet, the release sheet with a large amount of adhesive remaining must be discarded, creating a bottleneck in efforts to reduce costs.

B. Structure of the invention [Means for solving problems] The present invention is a laminated reinforcing sheet of coarse glass cloth and non-woven fabric, in which an adhesive layer is formed on the surface of the coarse glass cloth, and the non-woven fabric surface is attached to the adhesive layer. By providing releasability, a release sheet is not required, and the above-mentioned conventional problems are solved.

That is, the present invention has an adhesive layer on the lower half of the constituent yarns on the lower surface side of the coarse glass cloth that has been sealed, and has a nonwoven fabric adhesively laminated on the upper surface of the coarse glass cloth. A nonwoven fabric laminated adhesive coarse glass cloth characterized in that the nonwoven fabric is one in which constituent fibers are bonded to each other by a synthetic resin binder that is releasable to the adhesive layer, and the coarse glass cloth has been subjected to sealing treatment as described above. In an embodiment, two or three layers of glass fiber yarn layers arranged in parallel at a predetermined interval are laminated with the yarn directions perpendicular to each other to form a fabric-like sheet in which the yarns are glued and sealed. It is something to do.

Coarse glass cloth has a thread density of 2 to 20 threads/25 mm, which is the same as before, and can be fabrics such as plain weave or leno weave, or fabrics with two or three layers of parallel threads arranged vertically. A sheet is sealed by a binder treatment, and the amount of binder deposited is usually 10 to 30% by weight of the treated weight.

A solution or dispersion of an ordinary synthetic resin adhesive with a dry adhesive film is applied to the bottom side of the sealed coarse glass cloth with a solid content of 0.5 to 7.
g/m ² , preferably 1 to 3 g/m ² , and dried by roller coating to form an adhesive layer on the lower half of the yarn on the lower side of the cloth.

The nonwoven fabric that is adhesively laminated on the upper surface of the coarse glass cloth is a synthetic resin binder that is releasable to the adhesive provided on the lower surface of the cloth, for example, a self-crosslinking acrylic material that cures by three-dimensional crosslinking, for bonding between fibers. An acid ester resin or the like is selected, and usually has a unit weight of 15 to 100 g/m ² and is used so that its adhesion rate is 5 to 20% of the total weight of the nonwoven fabric.
If the unit weight of the nonwoven fabric is less than 15g/ ^m2 , the retention effect of the coating resin will be insufficient, and if it is more than 100g/ ^m2 ,
Either method is unsuitable because the amount of coating resin becomes excessive and sufficient impregnation becomes difficult.

Coarse glass cloth and nonwoven fabric can be bonded by laminating and heating if the filler binder is thermally adhesive, or by applying a regular adhesive to the coarse glass cloth surface. This is done without narrowing the opening area.

The drawings are schematic cross-sectional views showing embodiments of the present invention, and Fig. 1 shows a case where a plain weave coarse glass cloth is used as the base fabric, and Fig. 2 shows a layer of parallel aligned yarns arranged vertically in a direction perpendicular to the yarn direction. When the base fabric is a two-layer fabric-like sheet, Figure 3 shows the case where the base fabric is a fabric-like sheet with three layers of parallel aligned yarn layers, top, middle, and bottom, with the yarn directions perpendicular to each other. 1 is the warp, 2 is the weft, and 3 is the nonwoven laminated adhesive coarse glass cloth.
4 is an adhesive layer, 5 is a nonwoven fabric.

[Effect]

Since the present invention has the above-mentioned configuration, the adhesive layer exists on the lower half of the yarn on the lower surface of the cloth and has an adhesion effect to the base surface, and the coarse glass cloth is sealed and maintains a stable form. The nonwoven fabric adhesively laminated on the top surface has its constituent fibers bonded to each other by a binder that is releasable to the adhesive layer, and since the binder is distributed and adhered to the surface of the nonwoven fabric, this nonwoven fabric laminated adhesive coarse glass cloth is rolled. When it is shipped in a state where it is attached and used at a construction site, it can be easily rewound and unfolded, and in that case, it can be applied stably and smoothly without causing any misalignment of the weft or weft threads or peeling of the nonwoven fabric and glass cloth. .

Particularly in the case of vertical surface construction, the coating resin liquid is impregnated into the nonwoven fabric layer to prevent it from dripping downward, and it is possible to form a uniform coating film and strengthen the cured coating layer. be.

〔Example〕

Glass yarn (ECG751/0 manufactured by Nittobo Co., Ltd.,
607 denier) with a thread density of 10 threads/25 mm, and this is laminated into two layers, top and bottom, as warp and weft.
A hot-melt binder of ethylene/vinyl acetate copolymer was melt-coated with a resin adhesion rate of 30% (based on the total weight) to obtain a coarse glass cloth in the form of a textile-like sheet.

An emulsion of acrylic acid ester resin that makes the dried coating film sticky is applied to the bottom surface of this cloth using a roller coater so that the resin adhesion amount is 2.5 g/ ^m2 , and it sticks to the bottom half of the threads that make up the cloth. Form a layer of agent.

In the adhesive roller coating process, a vinylon nonwoven fabric is simultaneously laminated on the opposite side of the adhesive coated surface, and the adhesive is heated and dried to heat-melt a portion of the sealing binder of the coarse glass cloth to form a nonwoven fabric. The product of the present invention was obtained by lightly press-bonding and cooling.

The nonwoven fabric used here has a unit weight of 20g/m ² and is approximately 10
The constituent fibers are bonded to each other by a self-crosslinking acrylic acid binder of % by weight, and the binder is distributed and adhered to the surface of the nonwoven fabric.

The product is wound into a roll so that the surface on which the adhesive layer is formed is the outer surface of the roll, wrapped in release paper, and unpacked at the construction site, and the step-like concrete surface with the rising surface is treated with a primer. When the film was unwound and stretched, the unwinding process was extremely smooth, the adhesive was stable and smooth, and the polyurethane waterproof coating coated on it did not sag on the rising surface. A good cured coating layer could be formed.

[Effect of idea]

Since the present invention has the above-described structure and function, non-woven fabrics can be laminated using the minimum required amount of adhesive without requiring an adhesive application process even on vertical surfaces such as walls of buildings and complex surfaces such as external corners and corners. A reinforcing layer of coarse glass cloth can be easily formed, and it can be handled without the need for a release sheet, so it can have practical effects such as improving the efficiency of this type of coating work and reducing costs. It is something.

The nonwoven laminated adhesive coarse glass cloth of the present invention is not limited to the above-mentioned use as a reinforcing material for waterproofing work, but can also be applied to vehicles, ships, and other machinery and equipment to achieve similar effects. It can also be used for layer formation, and the nonwoven fabric to be laminated at that time can be made of synthetic fibers such as vinylon and polyester, as well as inorganic fibers such as glass fiber, etc., and can be selected as appropriate. be.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, in which Fig. 1 shows a plain woven fabric, Fig. 2 shows a two-layer laminated fabric-like sheet, and Fig. 3 shows an embodiment of the present invention.
The figure is a schematic cross-sectional view of a nonwoven laminated adhesive coarse glass cloth when each of the third laminated fabric-like sheets is used as a coarse glass cloth. 1... Warp, 2... Weft, 3... Binder layer, 4
...Adhesive layer, 5...Nonwoven fabric.

Claims (1)

[Claims for Utility Model Registration] 1. A coarse glass cloth that has been sealed, has an adhesive layer on the lower half of the constituent threads on the lower side, and has a nonwoven fabric adhesively laminated on the upper surface of the coarse glass cloth. 1. A nonwoven laminated adhesive coarse glass cloth, characterized in that the nonwoven fabric has constituent fibers bonded to each other by a synthetic resin binder that is releasable to the adhesive layer. 2 Two or three layers of glass fiber threads made of coarse glass cloth that has been sealed and aligned in parallel at predetermined intervals are stacked one above the other with their thread directions perpendicular to each other, and the threads are bonded together. The nonwoven fabric laminated adhesive coarse glass cloth according to claim 1, which is a fixed woven fabric-like sheet.